Nice win and I'm guessing he is over the injury he had. I think he could pose a couple of problems to Roddick if he believes in himself. Zverev had been in pretty bad form at the end of last year as well so it might have just been luck of the draw. Too early to say how far he will go though given his inconsistency but he has a huge opportunity this summer to make himself known to the general Australian public who watch tennis once a year.